you could edit taxonomy-ad_cat.php.
create images named categoryname.jpg (like "cars.jpg"), and put this on line 25 or 27:
<img src="/pathtocategoryimages/<?php echo $term->name; ?>.jpg">
...
you could edit taxonomy-ad_cat.php.
create images named categoryname.jpg (like "cars.jpg"), and put this on line 25 or 27:
<img src="/pathtocategoryimages/<?php echo $term->name; ?>.jpg">
...
